Forget about printing in 3D; it turns out that scientists are looking forward to printing in 4D. They’ve successfully added a fourth dimension to their printing technology, opening up exciting possibilities for the creation and use of adaptive, composite materials in manufacturing, packing and biomedical applications.
In order to actually accomplish this feat, the researchers incorporated “shape memory” polymer fibers into the composite materials used in traditional 3D printed. These fibers result in the production of an object fixed in one shape that can later be changed to take on a new shape. At first, the scientists combined a strand of plastic with a layer made out of “smart” material that could self-assemble in water.
“We advanced this concept by creating composite materials that can morph into several different, complicated shapes based on a different physical mechanism,” said Martin Dunn, one of the researchers, in a news release. “The secret of using shape memory polymer fibers to generate desired shape changes of the composite material is how the architecture of the fibers is designed, including their location, orientation and other factors.”
It happens to the best of us. Maybe accounting didn’t get you the numbers on time. Maybe the design work you thought would take you four hours is taking more like 14. Maybe Taco Tuesday turned into Food Poisoning Tuesday, and there’s just no way you can drag yourself to the office to finish Wednesday’s client report.
In any case, you’re going to miss a deadline, and you know your boss, your customer, or whoever else you owe your work to is not going to be excited.
As a writer and an editor, I’ve unfortunately been on both sides of the missed deadline dilemma. And here are a few things I’ve tried and seen that will help you get the extension you need while keeping your relationships intact.
David Cohen understands that mosquitoes aren’t just pesky annoyances — they’re global killers, too.
That’s why the 12-year-old from Dallas invented a robot that drowns the pests using a pump-jet system that traps them underwater using mesh. He submitted his work to the Discovery Education 3M Young Scientist Challenge earlier this year and is one of the competition’s ten finalists.
The challenge, which is open for students who are in grades 5 through 8 at the time of submission, awards its winner $25,000, the title of “America’s Top Young Scientist,” and an all-expenses paid vacation. A victor will be decided after finalists present their work on Oct. 13 and 14 in St. Paul, Minnesota.
Edward Baptist’s new book, “The Half Has Never Been Told: Slavery And The Making Of American Capitalism”, drew a lot of attention last month after the Economist said it was too hard on slave owners.
What you might not have taken away from the ensuing media storm is that “The Half Has Never Been Told” is quite a gripping read. Baptist weaves deftly between analysis of economic data and narrative prose to paint a picture of American slavery that is pretty different from what you may have learned in high school Social Studies class.
The whole thing is well worth reading in full. Baptist positions his book in opposition to textbooks that present slavery like a distant aberration of American history, cramming 250 years into a few chapters in a way “that cuts the beating heart out of the story.” To counter that image of history, Baptist devotes much of the book to depicting the lived experience of enslavement in a way that’s vivid and immediate.
An international team of researchers studying King Tutankhamun are reporting some surprising new discoveries about the ancient boy king.
The scientists say that a ‘virtual autopsy’ of Tut — essentially a close analysis of a life-size image of the king made from more than 2,000 CT scans of his mummified remains — shows that he had buck teeth and a club foot as well as a girlish figure.
The findings, featured in a new BBC One documentary entitled “Tutankhamun: The Truth Uncovered,” suggest a new explanation for King Tut’s mysterious death.
A New York City doctor who recently returned from treating Ebola patients in Guinea tested positive for the disease on Thursday.
Dr. Craig Spencer, 33, reported a fever of 100.3 degrees and gastrointestinal problems Thursday morning, both symptoms of Ebola. He was then transported to Bellevue Hospital in an ambulance staffed by a “specially trained HAZ TAC unit wearing Personal Protective Equipment,” according to a statement from the New York City Department of Health and Mental Hygiene. Tests conducted at the hospital revealed that he had the virus.
Spencer is the only case of Ebola in the city of more than 8 million. He is now the fourth person to be diagnosed in the U.S. with the viral disease.